1. 03 Jun, 2008 1 commit
    • Simon Marlow's avatar
      New flag: -dno-debug-output · 667ef993
      Simon Marlow authored
      From the docs:
         <para>Suppress any unsolicited debugging output.  When GHC
           has been built with the <literal>DEBUG</literal> option it
           occasionally emits debug output of interest to developers.
           The extra output can confuse the testing framework and
           cause bogus test failures, so this flag is provided to
           turn it off.</para>
      667ef993
  2. 13 Dec, 2007 1 commit
  3. 09 Oct, 2007 1 commit
  4. 20 Sep, 2007 1 commit
  5. 22 Apr, 2007 1 commit
  6. 03 Oct, 2006 4 commits
  7. 07 Apr, 2006 1 commit
    • Simon Marlow's avatar
      Reorganisation of the source tree · 0065d5ab
      Simon Marlow authored
      Most of the other users of the fptools build system have migrated to
      Cabal, and with the move to darcs we can now flatten the source tree
      without losing history, so here goes.
      
      The main change is that the ghc/ subdir is gone, and most of what it
      contained is now at the top level.  The build system now makes no
      pretense at being multi-project, it is just the GHC build system.
      
      No doubt this will break many things, and there will be a period of
      instability while we fix the dependencies.  A straightforward build
      should work, but I haven't yet fixed binary/source distributions.
      Changes to the Building Guide will follow, too.
      0065d5ab
  8. 03 Oct, 2004 1 commit
  9. 16 Aug, 2004 1 commit
  10. 15 Aug, 2004 1 commit
    • panne's avatar
      [project @ 2004-08-15 20:37:22 by panne] · b9de29ac
      panne authored
      Started to convert the users guide to DocBook XML. Not yet finished, there are
      still *tons* of misplaced indexterms, but some sensible documentation can
      already be generated.
      b9de29ac
  11. 08 Aug, 2004 1 commit
  12. 06 Jan, 2004 1 commit
  13. 16 Feb, 2001 1 commit
  14. 15 Feb, 2001 1 commit
  15. 12 Dec, 2000 1 commit
  16. 29 Sep, 2000 1 commit
  17. 14 Sep, 2000 1 commit
    • simonpj's avatar
      [project @ 2000-09-14 13:46:39 by simonpj] · cae34044
      simonpj authored
      ---------------------------------------
      	Simon's tuning changes: early Sept 2000
      	---------------------------------------
      
      Library changes
      ~~~~~~~~~~~~~~~
      * Eta expand PrelShow.showLitChar.  It's impossible to compile this well,
        and it makes a big difference to some programs (e.g. gen_regexps)
      
      * Make PrelList.concat into a good producer (in the foldr/build sense)
      
      
      Flag changes
      ~~~~~~~~~~~~
      * Add -ddump-hi-diffs to print out changes in interface files.  Useful
        when watching what the compiler is doing
      
      * Add -funfolding-update-in-place to enable the experimental optimisation
        that makes the inliner a bit keener to inline if it's in the RHS of
        a thunk that might be updated in place.  Sometimes this is a bad idea
        (one example is in spectral/sphere; see notes in nofib/Simon-nofib-notes)
      
      
      Tuning things
      ~~~~~~~~~~~~~
      * Fix a bug in SetLevels.lvlMFE.  (change ctxt_lvl to dest_level)
        I don't think this has any performance effect, but it saves making
        a redundant let-binding that is later eliminated.
      
      * Desugar.dsProgram and DsForeign
        Glom together all the bindings into a single Rec.  Previously the
        bindings generated by 'foreign' declarations were not glommed together, but
        this led to an infelicity (i.e. poorer code than necessary) in the modules
        that actually declare Float and Double (explained a bit more in Desugar.dsProgram)
      
      * OccurAnal.shortMeOut and IdInfo.shortableIdInfo
        Don't do the occurrence analyser's shorting out stuff for things which
        have rules.  Comments near IdInfo.shortableIdInfo.
        This is deeply boring, and mainly to do with making rules work well.
        Maybe rules should have phases attached too....
      
      * CprAnalyse.addIdCprInfo
        Be a bit more willing to add CPR information to thunks;
        in particular, if the strictness analyser has just discovered that this
        is a strict let, then the let-to-case transform will happen, and CPR is fine.
        This made a big difference to PrelBase.modInt, which had something like
      	modInt = \ x -> let r = ... -> I# v in
      			...body strict in r...
        r's RHS isn't a value yet; but modInt returns r in various branches, so
        if r doesn't have the CPR property then neither does modInt
      
      * MkId.mkDataConWrapId
        Arrange that vanilla constructors, like (:) and I#, get unfoldings that are
        just a simple variable $w:, $wI#.  This ensures they'll be inlined even into
        rules etc, which makes matching a bit more reliable.  The downside is that in
        situations like (map (:) xs), we'll end up with (map (\y ys. $w: y ys) xs.
        Which is tiresome but it doesn't happen much.
      
      * SaAbsInt.findStrictness
        Deal with the case where a thing with no arguments is bottom.  This is Good.
        E.g.   module M where { foo = error "help" }
        Suppose we have in another module
      	case M.foo of ...
        Then we'd like to do the case-of-error transform, without inlining foo.
      
      
      Tidying up things
      ~~~~~~~~~~~~~~~~~
      * Reorganised Simplify.completeBinding (again).
      
      * Removed the is_bot field in CoreUnfolding (is_cheap is true if is_bot is!)
        This is just a tidy up
      
      * HsDecls and others
        Remove the NewCon constructor from ConDecl.  It just added code, and nothing else.
        And it led to a bug in MkIface, which though that a newtype decl was always changing!
      
      * IdInfo and many others
        Remove all vestiges of UpdateInfo (hasn't been used for years)
      cae34044
  18. 08 Sep, 2000 1 commit
  19. 06 Sep, 2000 1 commit
  20. 31 Aug, 2000 1 commit
  21. 25 May, 2000 1 commit
    • simonpj's avatar
      [project @ 2000-05-25 12:41:14 by simonpj] · 495ef8bd
      simonpj authored
      ~~~~~~~~~~~~
      		Apr/May 2000
      		~~~~~~~~~~~~
      
      This is a pretty big commit!  It adds stuff I've been working on
      over the last month or so.  DO NOT MERGE IT WITH 4.07!
      
      Interface file formats have changed a little; you'll need
      to make clean before remaking.
      
      						Simon PJ
      
      Recompilation checking
      ~~~~~~~~~~~~~~~~~~~~~~
      Substantial improvement in recompilation checking.  The version management
      is now entirely internal to GHC.  ghc-iface.lprl is dead!
      
      The trick is to generate the new interface file in two steps:
        - first convert Types etc to HsTypes etc, and thereby
      	build a new ParsedIface
        - then compare against the parsed (but not renamed) version of the old
      	interface file
      Doing this meant adding code to convert *to* HsSyn things, and to
      compare HsSyn things for equality.  That is the main tedious bit.
      
      Another improvement is that we now track version info for
      fixities and rules, which was missing before.
      
      
      Interface file reading
      ~~~~~~~~~~~~~~~~~~~~~~
      Make interface files reading more robust.
        * If the old interface file is unreadable, don't fail. [bug fix]
      
        * If the old interface file mentions interfaces
          that are unreadable, don't fail. [bug fix]
      
        * When we can't find the interface file,
          print the directories we are looking in.  [feature]
      
      
      Type signatures
      ~~~~~~~~~~~~~~~
        * New flag -ddump-types to print type signatures
      
      
      Type pruning
      ~~~~~~~~~~~~
      When importing
      	data T = T1 A | T2 B | T3 C
      it seems excessive to import the types A, B, C as well, unless
      the constructors T1, T2 etc are used.  A,B,C might be more types,
      and importing them may mean reading more interfaces, and so on.
       So the idea is that the renamer will just import the decl
      	data T
      unless one of the constructors is used.  This turns out to be quite
      easy to implement.  The downside is that we must make sure the
      constructors are always available if they are really needed, so
      I regard this as an experimental feature.
      
      
      Elimininate ThinAir names
      ~~~~~~~~~~~~~~~~~~~~~~~~~
      Eliminate ThinAir.lhs and all its works.  It was always a hack, and now
      the desugarer carries around an environment I think we can nuke ThinAir
      altogether.
      
      As part of this, I had to move all the Prelude RdrName defns from PrelInfo
      to PrelMods --- so I renamed PrelMods as PrelNames.
      
      I also had to move the builtinRules so that they are injected by the renamer
      (rather than appearing out of the blue in SimplCore).  This is if anything simpler.
      
      Miscellaneous
      ~~~~~~~~~~~~~
      * Tidy up the data types involved in Rules
      
      * Eliminate RnEnv.better_provenance; use Name.hasBetterProv instead
      
      * Add Unique.hasKey :: Uniquable a => a -> Unique -> Bool
        It's useful in a lot of places
      
      * Fix a bug in interface file parsing for __U[!]
      495ef8bd
  22. 27 Apr, 2000 1 commit
  23. 18 Apr, 2000 1 commit
  24. 24 Jan, 2000 1 commit
  25. 10 Jan, 2000 1 commit
  26. 05 Jan, 2000 1 commit